JPH0348619Y2 - - Google Patents

Description

[Detailed description of the invention] [Summary] In a fluid display device, before the rotating display is attracted and rotated by the permanent magnet in the erasing head,
For example, by moving the rotary display body with a brush, the coefficient of wear between the rotary display body and the rotating shaft that supports it is reduced, so that the rotary display body rotates reliably.

[Industrial application field]

The present invention relates to a fluid display device, and more particularly to a means for improving the rotation of a rotary display body supported on a rotating shaft in an erasing head portion of the fluid display device.

[Conventional technology]

The flow display device partially shown in the plan view of FIG. 3a and the side view of FIG. A display element (hereinafter referred to as a display element) 22 controls the rotation of the display element 21 that is attached perpendicularly to the upper and lower endless conveyor belts (hereinafter simply referred to as the belt) (in the vertical direction of the paper as seen in Figure a). 23 is a magnetic piece incorporated in the display element, 24 is an electromagnet, 25 is a rotation prevention plate that prevents unnecessary rotation of the rotating element 21,
Reference numeral 26 indicates an end face of the rotation suppressing plate 25, respectively.

A plurality of display elements 21 are arranged in the vertical direction of the rotating shaft 22, and one side thereof is colored black and the other side is colored red, for example.

The display element is advanced along with the rotating shaft 22 in the direction of the arrow in figure a, and the direction of movement is reversed in the left part (R part) of the figure, and then the display element is arranged in red or on a black background. Use the reverse method to create letters, shapes,
Symbols, etc. are displayed, and a person viewing the display device sees the display in the direction of arrow V in the figure.

As described above, the magnetic piece 23 is embedded in the display element 21. With reference to figure a, the display element 21
Suppose that it comes from position A to position C via B in the figure. When you want to display a message to the person viewing the display surface 21b, turn on the electromagnet 24 and turn the magnetic piece 23 to C.
When suction is applied at the position , when the display element 21 comes to the position D, it has been rotated by about 90 degrees from the arrangement at the position A. When the display element 21 passes the position E and approaches the position F, the display element 21 comes into contact with the end surface 26 of the rotation prevention plate 25, and rotates about 90 degrees to a state where it has rotated 180 degrees from the arrangement at the position A, that is. 2
1a and 21b are reversed, and positions G and H
The display surface 21 appears to the viewer when it is reversed.
Display b. Since the display element 21 rotates in this manner, it is also called a rotating body, such rotation of the display element 21 is called writing, and the electromagnet 24 is also called a write head. The above-described rotation of the display element 21 is performed by turning the electromagnet 24 ON and OFF in response to a signal from a control panel (not shown), and the characters, etc. are displayed from left to right when viewed from direction V in the figure a. Because of the fluid motion, the illustrated device is referred to as a fluid display device.

The entirety of the above-mentioned flow display device is shown in the plan view of FIG.
28 is a front display surface, 28 is a back display surface, 29 is a write head section consisting of a plurality of electromagnets 24, 30 is a sensor, and 31 is a front panel.

The above-mentioned sensor 30 is arranged as shown in the figure across a belt, and windows are formed in the belt at certain regular intervals, and the sensor light passes through the windows.
Due to the interruption, the electromagnet 24 is turned ON as described above.
Detection is performed at the timing when it is turned OFF, and desired writing is performed in the write head section.

The display element 21 is attached by fixing rotating shafts 22 to the upper and lower belts 20, as shown in the front view of FIG.

Before the display element 21 enters the write head section as described above, the display surface of the display element 21 must be uniformly aligned, and for this purpose, the erase head section shown in the plan view of FIG. Use. In addition, in the figure, 36 indicates a permanent magnet. The display element 21, which has moved leftward in the figure, turns in the direction shown by the arrow as the magnetic piece 28 is attracted by the permanent magnet 36, and when it leaves the permanent magnet 36, all the display elements 21 are The same side, in the example above, only the black or red side is displayed aligned in one direction. For this reason, the permanent magnet 36 is called an erasing head, and the portion where it is arranged is called the erasing head section. The writing described above is performed on the display elements whose display surfaces are aligned in this way.

[Problem that the invention attempts to solve]

In the erasing head section, the display element before entering the erasing head (permanent magnet) remains stationary after leaving the writing head, and when it is attracted to the permanent magnet in that state, the coefficient of friction with the rotating shaft increases. The display element is large because it is stationary, and in some cases there was a display element that did not rotate, as shown by the dotted line in FIG.

The present invention was created in view of these points, and an object of the present invention is to provide a fluid display device in which a display element rotates reliably in an erasing head section.

[Means for solving problems]

The above problem is that the front and back surfaces are display surfaces, and multiple rotatable display elements with magnetic pieces embedded in one side are mounted vertically on rotating shafts attached perpendicularly to the upper and lower endless conveyor belts. In a fluid display device that writes and displays information by rotating a rotary display element by an attractive force between an electromagnet and a magnetic piece provided in the write head part while the belt is moving forward, a permanent display is provided separately from the write part. An erasing head section composed of a magnet is provided, and a brush is placed in front of the permanent magnet when viewed in the direction of movement of the rotating display element, at a position where its bristles come into contact with the rotating display element, and the brush is rotated by contact between the bristles and the rotating display element. The problem is solved by providing a fluid display device characterized in that the display element is forcibly moved.

[Effect]

In the above arrangement, the display element 21, which has been moving at a considerable speed, always comes into contact with the bristles 33 of the brush 32 and is swayed by it, so that the display element 21 is no longer in a stationary state and the coefficient of friction becomes small. Next, approach the permanent magnet 36 and remove the magnetic piece 2.
3 is always rotated when it is attracted to the permanent magnet 36.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the present invention, a brush 32 having bristles 33 is placed in front of a permanent magnet 36 constituting an erasing head in the direction of movement of the display element 21, so that the bristles 33 of the brush are always connected to the display element 21, as shown in FIG. Place it in a position where it makes contact. If the bristles 33 are made of a material with sufficient rigidity, the display element, which has advanced at a considerable speed, will be forced into contact with the bristles 33 and will make irregular swaying movements. As a result, the coefficient of friction, which had been large until then due to the stationary state, becomes small, and when an attractive force is applied to the magnetic piece 23 from the permanent magnet 36, the display element 21 always moves as indicated by the arrow in FIG. When the magnet 36 rotates and leaves the permanent magnet 36, the display surfaces of all display elements are aligned. When writing is performed on display elements whose display surfaces are aligned in this manner, there is no display element that produces an erroneous display, so that the designed display is clearly produced.

The brush 32 may for example be attached to the base 3 of the fluid display device.
4 using normal techniques. The other end of the brush may similarly be secured to the surface panel 35 of the device. How to fix the brush 32 is determined as appropriate, taking into account the size and number of display elements, the speed at which they are moving, and the like.

If the bristles of the brush are made of a material that removes static electricity, the static electricity from the display element will be removed, so the display element will rotate reliably both mechanically and electromagnetically.

Although the above example uses a brush 32, the brush may be a post fixed between the base of the device and the surface panel, and a substance in place of bristles may be disposed.

[Effect of idea]

As described above, according to the present invention, in a fluid display device, the display element before entering the erasing head section is forcibly moved and is not in a stationary state, so the coefficient of friction is reduced and the permanent magnet Since it is always rotated by , the erasing effect is fully exhibited, which is very effective in obtaining the designed display.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a side view of an embodiment of the present invention, FIGS.
The figure is a plan view of a conventional flow display device, and FIG.
6 is a front view of the display element and rotating shaft of the device shown in FIG. 6, and FIG. 6 is a plan view of a conventional erasing head section. 1 to 6, 10 is a flow display device, 20 is a belt, 21 is a display element, 22 is a rotating shaft, 23 is a magnetic piece, 24 is an electromagnet, 25 is a rotation suppressing plate, and 26 is a rotation suppressing plate. End face, 27 is the front display surface, 28 is the back display surface, 29 is the write head, 30 is the sensor, 31 is the front panel, 32 is the brush, 33 is the bristles of the brush, 34 is the base of the device,
35 is a front panel, and 36 is a permanent magnet.

Claims (1)

[Claims for Utility Model Registration] A plurality of rotatable rotary display elements 21 having a front surface 21a and a back surface 21b as display surfaces and a magnetic piece 23 embedded in one side surface are arranged on the upper and lower endless conveyor belts 20.
The rotary display element 21 is mounted vertically on a rotating shaft 22 mounted perpendicularly to the rotary display element 21, and is rotated by the attractive force between the electromagnet 24 provided in the write head section 29 and the magnetic piece 23 while the belt 20 is moving forward. In the fluid display device 10 for writing and displaying information, an erasing head section composed of a permanent magnet 36 is provided separately from the writing section, and the permanent magnet 3
The brush 32 is arranged in front of the rotary display element 21 at a position where its bristles 33 come into contact with the rotary display element 21, and the rotary display element 21 is forcibly moved by contact between the bristles 33 and the rotary display element 21. Flow display device.